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21000-28-05-00-133-04-02

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The Bently Nevada 21000-28-05-00-133-04-02 is a explosion-proof aluminum proximity probe housing assembly engineered for critical rotating machinery protection.
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Technical specifications for 21000-28-05-00-133-04-02

  • Manufacturer:
    Bently Nevada
  • Part Number:
    21000-28-05-00-133-04-02
  • Stock:
    1
  • Probe with Connector:
    3300 XL 8mm probe, selectable hazardous area approvals
  • Probe Cable Length:
    0.5 m (20 in)
  • Standoff Adapter (Option C Dimension):
    No standoff adapter
  • Probe Penetration (Option D Dimension):
    13.3 in
  • Fittings:
    Two 3/4-14 NPT explosion-proof fittings
  • Operating Temperature:
    -51°C to +177°C (-60°F to +351°F) for the 3300 XL probe head and cable
  • Storage Temperature:
    -51°C to +177°C (-60°F to +351°F)
  • Pressure Rating:
    Sealing O-rings provide strict containment (probes must not drop below -34°C while pressurized)
  • Voltage / Current (Sensor):
    Passive proximity probe loop powered by external Proximitor (typically -24 VDC / max 15 mA)
  • Frequency Response:
    0 Hz to 10 kHz (when integrated with a 3300 XL Proximitor Transducer System)
  • Weight:
    1.05 kg
  • Estimated shipping dimensions:
    30.5x8.5x8.5cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Applications Monitoring & Control Safety & Compliance

Features:

  • API 670 Standard Structural Compliance
  • Dual-Zone Hazardous Area Certifications
  • Premium All-Weather Environmental Sealing
The Bently Nevada 21000-28-05-00-133-04-02 is engineered to strict API 670 mandates for externally mounted proximity transducer systems. This precise design gives technicians direct access to adjust the sensor gap or completely replace the 3300 XL 8mm probe from the machine's exterior, vastly shortening emergency downtime windows by removing the need to dismantle complex machinery casings.

Featuring full CSA explosion-proof ratings for North American Class I, Divisions 1 & 2 (Groups C & D), the Bently Nevada 21000-28-05-00-133-04-02 guarantees elite structural safety in volatile atmospheres. Furthermore, when wired with a matching approved Proximitor sensor and galvanic isolation barriers, it supports intrinsically safe installation architectures.

Constructed as a certified CSA Type 4 weatherproof enclosure, the Bently Nevada 21000-28-05-00-133-04-02 acts as an impenetrable shield against harsh outdoor elements. The tight-fitting dome cover and internal premium O-rings protect critical coaxial connectors and extension cables from corrosive humidity, extreme thermal cycles, and abrasive industrial airborne dust.

The 21000-28-05-00-133-04-02 Bently Nevada Proximity Probe Housing Assembly may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 21000-28-05-00-133-04-02 Proximity Probe Housing Assembly Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Bently Nevada 21000-28-05-00-133-04-02 Proximity Probe Housing Assembly

General

  • Manufacturer GE / Bently Nevada
  • Model 21000-28-05-00-133-04-02
  • Condition New Original ready stock
  • Product Family 21000-28-05-20-035-03-02,21000-16-05-00-027-04-02,21000-16-10-00-077-03-02
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Steam & Gas Turbine Shaft Supervision: The Bently Nevada 21000-28-05-00-133-04-02 is deployed on heavy utility-scale steam and gas turbines to track high-speed rotor shaft relative vibration and axial thrust position, providing early warnings for catastrophic rubbing or thermal rotor expansion.
  • Critical Petrochemical Compressors: Ideally configured for centrifugal and reciprocating gas compressors in chemical plants, this assembly provides long-reach oil-tight sealing, coping with aggressive mechanical surges and severe structural casing frequencies.
  • High-Pressure Boiler Feed Pumps: It fits directly into industrial boiler feed water pumps and extraction fluid pumps, managing continuous asset health surveillance under extremely humid and localized high-temperature plant conditions.
  • Industrial Gearboxes & Cooling Fans: Used across heavy cooling towers and reduction gear trains to map radial shaft alignment, ensuring that sub-millimeter bearing shifts are picked up instantly before tooth misalignment or mechanical failure occurs.
  • Direct Machinery Protection Integration: The high-accuracy 8mm sensor element enclosed within the Bently Nevada 21000-28-05-00-133-04-02 transmits low-noise analog raw data directly to rack modules like the 3500/42M, acting as the primary source for automatic hazard machine trips.
  • Condition Monitoring & Predictive Diagnostics: When connected to Bently Nevada System 1 software via modern Proximitor circuits, the Bently Nevada 21000-28-05-00-133-04-02 helps plot orbits, time-base waveforms, and shaft centerline trends, letting plant engineers transition to predictive maintenance schedules.
  • Precision Mechanical Gap Calibration: The specialized housing design allows maintenance engineers to loosen the mounting locknuts externally and precisely rotate the assembly to recalibrate the baseline DC gap voltage (typically set to -10.0 VDC for 3300 XL systems) without stopping the machine.
  • Cross-Talk & Electromagnetic Isolation: Built with a solid aluminum housing and an internally shielded coaxial pathway, the Bently Nevada 21000-28-05-00-133-04-02 prevents high-voltage motor EMI and adjacent sensor cross-talk from corrupting critical vibration waveforms.
  • Strict API 670 Machinery Standards Alignment: Every structural dimension and maintenance window of the Bently Nevada 21000-28-05-00-133-04-02 complies with the 5th and 6th editions of the API 670 standard, fulfilling international bidding specifications for major oil & gas infrastructure projects.
  • Robust Hazardous Area Explosive Ratings: Certified as explosion-proof by the Canadian Standards Association (CSA) for North American Class I, Div 1 & 2 atmospheres, the Bently Nevada 21000-28-05-00-133-04-02 ensures that internal electrical faults cannot ignite surrounding hydrocarbon gases.
  • Environmental Enclosure Certification: Reaching the demanding CSA Type 4 rating, the Bently Nevada 21000-28-05-00-133-04-02 guarantees total protection against driving rain, high-pressure washing, outdoor ice formation, and abrasive coastal salt-spray corrosion.
  • Functional Safety (SIL) Instrumented Loop Support: As a part of an approved Bently Nevada transducer system, the Bently Nevada 21000-28-05-00-133-04-02 supplies high-integrity data loops suitable for deployment in SIL 2 and SIL 3 emergency safety instrumented shutdown systems (SIS).
Description
The Bently Nevada 21000-28-05-00-133-04-02 features a premium copper-free aluminum body paired with a rugged 304 stainless steel probe sleeve, delivering an exceptional balance of lightweight structure and extreme environmental resistance. Certified to CSA Type 4 (IP67 equivalent) and rated for North American Class I, Div 1 & 2 hazardous locations, this robust housing safeguards sensitive eddy-current sensors against explosive vapors, corrosive chemicals, and high-velocity oil splashes typically found in oil & gas and petrochemical refining plants.

At the heart of the Bently Nevada 21000-28-05-00-133-04-02 is the factory-integrated 3300 XL 8mm reverse-mount proximity probe (Option 28), universally recognized as the global benchmark for non-contacting vibration and shaft position measurements. Equipped with multiple hazardous area agency approvals, this setup incorporates a 0.5-meter (20-inch) high-integrity probe cable (Option 05) that terminates cleanly within the junction dome, facilitating error-free connection to external extension cables and Proximitor sensors while maintaining tight signal shielding.

Designed with an optimal 13.3-inch (337.8 mm) probe penetration sleeve depth (Option 133) and zero standoff adapter displacement (Option 00), the Bently Nevada 21000-28-05-00-133-04-02 provides direct, vibration-resistant access through thick outer casing walls into the machine's internal bearing blocks. By leveraging the industry-standard 3/4-14 NPT mounting thread (Option 02) and a standalone 3/4-14 NPT conduit plug (Option 04), field engineers can effortlessly secure the assembly into the pre-tapped casing ports, achieving a rigid mechanical fit that ensures uncompromised sensor linearity over decades of continuous operation.
Alternative Names
21000 28 05 00 133 04 02 21OOO-28-O5-OO-133-O4-O2 2I000-28-05-00-I33-04-02 2IOOO-28-O5-OO-I33-O4-O2 21000-28-05-20-035-03-02 21000-16-05-00-027-04-02 21000-16-10-00-077-03-02
Technical notes
The Bently Nevada 21000-28-05-00-133-04-02 is fully certified to meet the stringent requirements of the American Petroleum Institute’s API 670 standard for externally mounted proximity probe housings. Because the customized 13.3-inch sleeve length of the Bently Nevada 21000-28-05-00-133-04-02 exceeds the 12-inch threshold, it is highly recommended to install a dedicated internal sleeve support (such as Bently Nevada part number 37948-01) to eliminate mechanical resonance and cross-talk during operation.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Which specific extension cables and Proximitor sensors are compatible with the Bently Nevada 21000-28-05-00-133-04-02?
The Bently Nevada 21000-28-05-00-133-04-02 houses a 3300 XL 8mm reverse-mount probe with multiple approvals. It must be paired with standard Bently Nevada 3300 XL 5-meter or 9-meter extension cables and a 3300 XL Proximitor Sensor (e.g., 330180 series). Ensure the system lengths match (e.g., a 0.5-meter probe requires a 4.5m or 8.5m extension cable) to guarantee the calibrated 7.87 V/mm(200 mV/mil)sensitivity.
Does the internal probe inside the Bently Nevada 21000-28-05-00-133-04-02 output any specific protocol, and how is the diagnostic depth achieved?
The probe within the Bently Nevada 21000-28-05-00-133-04-02 outputs a raw analog high-frequency eddy-current signal (not a digital protocol). True diagnostic depth is achieved when this signal is connected via a Proximitor to a rack monitor like the Bently Nevada 3500/42M or Orbit 60, allowing for real-time gap voltage tracking, OK circuit status validation, open/short circuit fault detection, and detailed machinery cross-talk identification.
How should the internal coaxial connection of the Bently Nevada 21000-28-05-00-133-04-02 be wired and insulated during field integration?
The 0.5-meter cable inside the Bently Nevada 21000-28-05-00-133-04-02 features a miniature ClickLoc coaxial connector. When attaching it to your external extension cable within the aluminum dome housing, always wrap the joint with Bently Nevada connector silicone self-locking tape or use a connector protector sleeve to prevent grounding faults caused by oil fog or condensation touching the machine's metallic shield.
Are there any specific installation restrictions due to the 13.3-inch penetration depth of the Bently Nevada 21000-28-05-00-133-04-02?
Yes. Because the sleeve length of the Bently Nevada 21000-28-05-00-133-04-02 is 13.3 inches—which exceeds the 12-inch (304 mm) limit defined in official datasheets—you must provide an internal sleeve support (such as part 37948-01) near the probe tip. Failing to add structural support can cause the stainless steel sleeve to flex or resonate with machine frequencies, altering the sensor's calibration and potentially causing internal mechanical damage.